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1, selection of resistant varieties. In the production of vegetables, it is necessary to select the varieties of vegetables that are suitable for local cultivation and have strong disease resistance, in accordance with the occurrence of local pests and diseases, and the types of major vegetable diseases. It is best to use high-resistance and multi-resistance varieties.
2. Reform the farming system, rational rotation and intercropping. It can not only improve the utilization of local resources, increase the diversity of crops, but also facilitate the complementarity between crop groups, balance the use of soil nutrients, reduce the occurrence of natural disasters and pests, and reduce the pollution of drugs.
3. Adjust the sowing date and avoid the peak period of pests and diseases. The early and late sowing time of vegetables not only affects the yield and quality, but also has a close relationship with the occurrence of pests and diseases. Generally, early or late sowing can avoid the high temperature and high humidity season, which can effectively reduce the occurrence of pests and diseases.
4. Cultivate strong virus-free seedlings
(1) Grafting seedlings. Grafting Techniques is the most effective prevention and treatment of soil-borne diseases, most economical cultivation measures. The rootstocks used in grafting have strong root systems, which can increase the comprehensive resistance of plants.
(2) Seedlings in different places or in the land. Vegetable seedlings grown on fields that have been planted for many years are prone to seedling diseases such as blight and stagnation diseases. If seedlings are cultivated in different places, they can be effectively alleviated on fields that have not planted such vegetables or in the soil. The occurrence of diseases such as blight and stagnation.
(3) With medicine and colonization. Before planting the seedlings, it is necessary to spray the medicine once and eliminate the diseased seedlings to ensure that the seedlings planted in the field are robust seedlings without pests and diseases.
5. Optimize the population structure of vegetables
(1) Rational allocation of plants. Appropriate planting can make the individual traits of the plant fully developed, grow robust, improve the ability to resist pests and diseases and natural disasters, reduce the air humidity of the group, and form environmental conditions that the pests and diseases are not easy to breed.
(2) Bracket or hanging vine. Stent cultivation can enhance the ventilation and light transmission within the group, reduce the air humidity in the group, make the plant grow robust, and enhance the ability to resist pests and diseases.
(3) Pruning. It can improve and optimize the structure of vegetable population, avoid plant growth and enhance disease resistance.
6, deep ditch sorghum cultivation. It can effectively prevent water accumulation in the field after watering or raining, thicken the soil layer, improve the permeability of the soil, promote the growth of roots, keep the soil surface dry and loose, and effectively reduce the occurrence of pests and diseases.
7, suitable fertilizer and water control
(1) Rational fertilization. In the production of vegetables, scientific and reasonable fertilization should be carried out according to the characteristics of vegetables required for fertilizer. In order to reduce pollution, chemical fertilizer should be applied as little as possible, and the application amount of organic fertilizer should be increased appropriately. Adding organic fertilizer can increase fertility, and it can also be changed.
Physical and chemical properties of good soil.
(2) Scientific watering. Too much soil moisture can cause long growth, plant tissue is soft, resistance is reduced, and it is easy to get sick. The soil moisture content is too low, which is not conducive to the growth and development of plants. Avoid or drought or sputum.
8, reasonable facilities micro-environment regulation
(1) Cover the mulch film in the protection facility. Covering the mulch in the shed can significantly reduce the evaporation of soil moisture, reduce the indoor air humidity, and thus reduce the occurrence of diseases.
(2) Release the wind in time to control the humidity. Timely ventilation can release the moisture in the shed, reduce the relative humidity of the indoor air, and discharge the harmful gases in the shed, significantly reducing the occurrence of diseases.
9. Proper use of growth regulators. In the process of using growth regulators, pay attention to the type of selection, concentration, method and frequency of use. Some growth inhibitors are not easy to decompose in the soil due to their long residual effect in the plant. They should be used cautiously in production, such as b9, pp333, etc. These hormones not only affect the growth of the vegetables in the current season, but also affect the growth and development of the next season. .
10. Organic ecological soilless cultivation and soil isolation cultivation. This measure can be used if the soil is heavily polluted. It refers to a soilless cultivation technique that uses a substrate without using natural soil to irrigate plant roots without using traditional nutrient solution, and uses organic solid fertilizer and directly irrigates crops with clean water.
11, clear the pastoral. Clean the pastoral and eliminate weeds can eliminate the wintering or turning of the main pests and their breeding grounds, reducing the possibility of pests and diseases.
12. Establish a disease-free and insect-free field. When you want to stay in farming Zaimiao strictly eliminate diseased seedlings, planting seedlings of all, at the time of harvest seed strains selected pest-free plants Seed.
Source of information: Youxian District Agricultural Information Service Center
2. Cree, Osram or Lumileds LED brand choice provide good color mixed and a wide view angle;
3. Built-in PWM high brightness contrast level control for smooth and consistent color change effect;
4. Polycarbonate housing with clear flat UV-resist diffuser, weather-sealed with silicon polymer for maximum lifespan;
5. Use standard CAT5 for signal transmission. Customizable pixel node pitch and lead cable length;
6. Easy mounting and installation with stainless steel spring bracket. Single node mounts can be positioned individually to support complex structure geometries;
7. DC24V input. DMX control. Ingress protection at IP66.
Agricultural control measures for pests and diseases of pollution-free vegetables
Refers to the environment pollution-free vegetable origin, production processes, product quality targets, in line with national pollution-free agricultural or agricultural industry standards and technical regulations, and pass through the origin and quality of the market supervision department inspection, the use of pollution-free agricultural identify the sales of vegetable products.
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